Fuel-burner



H. P. PORTER.

FUEL BURNER. I APPLlCATlON FILED MAR. 12, 1921:

1&9151139, Patented Oct. 25, 1921,

WITNESSES l/V VE/V TOR Porter,

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' ATTORNEYS UNITED STATES HOLLIS mini: PORTER, or TULSA, OKLAHOMA.

FUEL-BURNER.

Specification of Letters Patent.

Patented Oct. 25, 1921.

Application filed March 12, 1921. Serial No. 451,890.

which the following is a specification.

This invention relates to burners especially adapted for burning gas as a means for heating the water in boilers though not restricted to such use.

An important object of this invention is to i provide a gas burner having novel means for efficiently employing gas under a low pressure.

A further object of the invention is to provide a gas burner having novel means for preventing back firing and for eliminating much of the noise incident to the use of burners of'this type. I

A still further object of the invention is to provide a gas burner having novel means whereby one of the supply tubes may be adjustably connected tothe same and held in such position.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawing forming a part of this application and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a central vertical sectional through the improved burner,

Fig. 2 is an end elevation of the same,

Fig. 3 is a central vertical transverse sectional view through the same.

In the dr wing wherein for the purpose of illustration is shown a preferred embodiment of the invention the numeral 10 designates an outer cylindrical section which constitutes the body of the burner and within which is arranged a mixing section generally designated by the numeral 11. As i1lustrated in Fig. 1, the mixing section 11 has its ends flared outwardly and welded or otherwise secured to the ends of the body 10 so as to form an annular chamber 12 which extends for the entire length of the body.

ln-carrying out the invention I supply gas to the annularchamber 12 through a nipple 13 which may be connected to a 'suitable source of gas supply.

The inner section 11 which is open at its ends has its forward end portion arranged in the form of a truncated cone so as to de- View fine a conical discharge nozzle 14 through which the mixed air and gas pass when injected into the furnace or fire box.

The rear end portion of the inner section 11 is also arranged in the form of a truncated cone so as to define an air inlet 15 which is gradually reduced toward its forward end and which discharges the air into a reduced throat 16 of tubular formation. In other words, it might be stated that the section 11 consists of a tubular body having its end portions arranged in the form of truncated cones which are connected by means of a comparatively narrow throat. The air, upon passing through-the air inlet end, is gradually concentrated as it approaches the narrow throat 16 and therefore the velocity of the same is increased. The velocity thus imparted to the air creates a vacuum within the narrow throat 16 so that the gas contained within the annular chamber 12- is caused to enter the narrow throat 16 through a plurality of orifices or apertures 17.

Asillustrated in Fig. 1, the apertures are inclined toward the forward end of the burner sov that the air in rushing through the narrow throat will readily draw the gas from the chamber 12. Due to the formation of the section 11 the intermediate portion of the annular chamber 12 is greatly enlarged "so that a substantial quantity of gas is maintained at the apertures 17 which are located intermediate the ends of the section 11.

In carrying out the invention I provide a coupling 20 which has an opening to receive a steam supply pipe 21 and with a second opening to receive the rear end portion of a tubular" jet designated by the numeral 22. A quantity of air may be admitted to the mixing chamber 23 of the coupling 20 through a tube 24 arranged at right angles to the tube 21. The forward end of the steam supply pipe 21 terminates in spaced relation to the rear end of the tubular jet 22 so that the vacuum thus created within the chamber 23 will draw a quantity of oil through the tube 24.

The tubularsupply member 24 is threaded into the coupling 20 as are the pipes 21 and 22 and may therefore be adjusted with relation to the adjacent ends of the pipes 21 and 22 so that the mixture may be varied as desired. The tubular supply member 24. is extended through alined openings 25 in the arms of a U-shaped bracket 26. A set screw 27 is extended through the bight portion of the U-shaped bracket and engages the member 24 between the arms of the bracket so as to hold the same in an adjusted position.

In the operation ofthe improved burner, the nipple 13 is connected to a suitable source of gas supply so that gas under pressure will be supplied to the chamber 12 which, as previously stated, is enlarged intermediate its ends for the purpose of feed ing an adequate quantity of gas to the restricted throat 16. The tubular jet 22 which extends axially within the air inlet chamber 15 draws a quantity of air into the conical chamber 15, which air is increased in velocity so that as it passes through the throat 16 it will freely draw the gas through the inclined openings 17 The openings 17 are preferably arranged in staggered relation and may be of any desired number.

The air and gas upon entering the frusto conical nozzle 14 are thoroughly mixed and discharged into the firebox of the boiler or furnace where combustion takes place.

By ineans of the construction described a lower pressure gas may be used than would otherwise be possible and the device is prevented from back firing.

Having thus described the invention, what is claimed is 1. A burner of the class described comprising a body'of tubular formatioman inner section having its end portions arranged in frusto conical formation and secured to the ends of said tubular body thereby defining an air inlet chamber and a discharge nozzle, said inner section and said body defining an annular gas chamber extending for the entire length of the body and having its intermediate portion thickened, the portion of said inner section between said air inlet chamber and said discharge nozzle defining a narrow tubular throat having openings communicating with the thickened intermediate portion of said annular chamber, and a tubular jet extending axially into said air inlet chamber and terminating rearsection and said body defining an annular.

gas chamber extending for the entire length of the body and having its intermediate portion thickened, the portion of said inner section between said air inlet chamber and said .discharge nozzle defining a short narrow tubular throat having openings communicating with the thickened intermediate portion of said annular gas chamber and inclined in the direction of said discharge nozzle, and.

means to supply steam to said throat for creating a vacuum within the same.

3. A burner of the class described comprising a body, a section arranged within the same and having frusto conical end portions defining an air inlet chamber at the rear end of the body and a discharge nozzle at the forward end of the body, the reduced ends of said chamber and said nozzle being arranged in spaced relation thereby defining a narrow throat of cylindrical forma tion, said throat being provided with annular series of staggered openings inclined in the direction of said nozzle, and a supply jet for said throat.

4. A burner comprising a body, and a section arranged within the same and having its end portions flared for defining an air 

